Adjustable gauge



June s, 1928. 1,672,488

. T. A. HALL ADJUSTABLE GAUGE Filed Sept. 9, 1924 30. 29 l' l. l.

, a /sgmi In. 17

Patented June 5, i928.

UNITED STAT TRYvGVE A. HALL, OF POUGHKEEPSIE, NEW YORK.r

ADJUSTABLE GAUGE..`

yl.Applixcatioii filed vSt-.ptember The invention relates to gauges usedto measure distances between points'fand more especially to the classwherein apa-ir ofcontact anvils on the exti'emities ofthe instrument andthe instrumentv itself are adjustabletowditferent dimensions and forcalibration to accurate standards, and for takingV up wear on theanvils.

Incidentally, it is one Aobject ofthe inven` tion to provide a gaugewhich is practically indestructible,and is likewise adaptedy for a widevariety of uses within its' sphere.

Other objects and attained advantages will appear hereinafter as thisspecification proceeds.

Inl the accompanying drawing Fig. 1 is a view of a gauge madefaccordfing to my invention.

Fig. 2 is anotherview of thesame with the upper portion or cover removedand some parts in section on line 28-28- Fig. 3 is a section of thebody-of Fig. 2 Y y t .spaced'points vwhose relative distance is rin` online 33-33, with the extremities yincluded for completeness. 1 y

Fig. L1l is a cross section of'Fig. 1 on line 29,-29,

, Fig. 5fis a cross sectionof'the same view' on 1in@ .ao-30.. t

Fig. 6 is also across section ofthe saine first view online'27`-27.

Throughout the views, like reference numbers indicate the same parts.

' In manufacturing machinery, 'resort is n often had toscales, gaugesand the like, land in the presenticase, tovsuch gauges as are adapted toaccuratelyr measure distances between points',v walls or otherappurtenances.

The present inventionis adapted for use in all the latter class of uses,and in the practice ot' my invention, a journalled casing 1 is providedwith a cover 2, and `together with the cover comprises a casing .for ashaft or rod 3 at one extremity and tor a similar rod 4 at the other. Apair of bearing blocks 20 and 17 assist in retaining the shafts inposi-V tion even if cover2 is removed; The shafts are provided at theouter ends with contact` anvils 5 and 6, and at the inner ends, the

9,'19'24. serial No. 7376.720.'

on thefthreads whereby to tightenthe turnbuckle on the shafts. The nutsalso serve slotted portions of the turnbuckle in any undue manner. kInorder toobtain a ner and more .reliablejmovemenu a worm 1lvhaving ashank 35 hasbeen inserted to engage the gear.y The shank is adaptedforengagement vby a common screw driver yby which the worm may beturned. i*

hard faces l7 andB, ywhichare the lwearing surfaces of theinstrument.But in order to insure absolute accuracy` and absence of play 'l vbetween the anvils and the bar extremitiesv upon which they are mounted,vthe anvils are The anvils 5 and 6 are provided with ,outer lthe purposeof preventing the spread of the .i

secured to'the bars'by Atapered screws. yOne f i l of these screws isshownat -9, `where the tapered portion 31 is adapted to wedge the end ofshaft LLaga-inst the nneijface of the' anvil 6 at 32. o v

yIf the instrumentv is used between v,two

doubt regardingaccuracy, the instrument is handled like any scaleforstraight gauge whose length is the sole criterionof its usefulness.thewear, l,and kwhen worn'beyond the limit o'faccuracy, a screw drivermaybeinser'ted to engage shank '-35 of the worin, ,thereby The 'outerfaces of the' anvils take turning the same and the gear and turnrods.: yIn' thefcase vof rod 3, a 'screw 24y has'r been'provided in the casingwith the extremity projecting into slot 23,A while in the other rod, akeyv partly projects into the slot l25 from the casing. Keys and screwsin this relation are interchangeable and, of course,

it is optional which are used. However,`

they prevent the rotation'of the shafts, while permittinglongitudinalmovement in either direction, according tothevrotation of theturnbuckle. f A l When the instrument.v hasy been properly calibrated bythus manipulating the various parts, the nuts 13 and 16 are tightened,this practically locking the turnbuckle on the y shafts, and then thecover 2 may be replaced.

The calibration screws and other parts simi! larvto 9, 24 and 35 lmay besealed against alteration or movement Aby sealing wax as at 34 andy 36,insuring accurate settings of rods slidably mounted in alignment in ,Ysaid casing and projectingfrom the extremities thereof, a turnbuckle insaid casing connecting the inner extremities of said` rods, there beingopen slots in the extre1nities of the turnbuckle, threads on both endsof said turnbuckie and a nut on each thread 'whereby to tighten saidturnbuckie oii said rods, and a cover for said casing.

2. A gauge comprising a casing having a pair of rods .slidably n'iountedin alignment and projecting from said casing, a longitudinaliy slottedportion in cach rod and a screw in the casing projecting into each ofsaid slotted portions to prevent rotation of said rods,y a turnbuc'klein said casing mounted on the inner extremities of said rods to connectthe same', means to rotate said turnbuckle and a cover for said casing.

3. Argauge comprising a casing, a pair of rods inoun'tedin alignment insaid casing and projecting from the extremities thereof, means toprevent the rotation of said rods, a turnbuokle mounted on said rodsWithin the casing, a cover for said casing and means` securing each ofsaid rods in position and` adapted to project into said cover.

5. A gauge comprising a casing, a pair ofv aligned rods mounted in thecasing and projecting from' the extremities thereof, a thread on theinner extremity of each of said rods, `a tuinbuckle mounted on saidthreads Within said casing and having a slotted section upon eachextremity thereof,l

ticsv projecting therefroin,` a turnbuchle mounted on said rods Withinthe casing,

means to rotate said turnbuckle,means to locate said turnbuclrle in thecasing comprising en'd Walls in the latter, vguides for said rods insaidv end Walls and bearing blocks upon said' end Wallsto retain saidrods in position in said casing.

l7. A gauge comprising a casingprovided 'with end Walls and a cover, abearing block on each of said end Walls within the respective extremityof the casing and adaptedto` project into said cover, a pair of alignedrods mounted in' said 'end Walls to project from the extremities of saidcasing and retained' by said blocks, threads: upon the inner extren'iities of said rods Within the casing and a tuinbuckle mounted onsaid rod tlireadsin said casing connecting the rods, means in said endvWalls adapted toproject into slots in said rods to guide the same inmovement and to prevent rotation thereof, and Vmeans to rotate saidturnbuckle comprising a gear mounted 'on the samejand a Worm in saidcasing in engagement with said`gear and provided with an extensionadapted to be engaged vby a tool whereby to rotate said Worin and gear,and contact means upon the outer extremities of aforesaid rods. j

Signed at the city of lPoughkeepsie, county of Dutchess this 30th day ofAugust` 1924. TRYGVE A. HALL.v

